Square numbers are the result of any number being multiplied by itself. 196 is a square number because 14 x 14 = 196.
Break it down:
14x10=140
14x4=56
140+56=196
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√196 is rational. √196 = √(14^2) = 14 - a whole number which is also a rational number.
It is simply 14 times 14 = 196
The square root of 196 is 14.
The square root of 196 is 14.
196 = 14² → √196 is rational.